Let’s start with something simple like how to start.
Make the starter. Combine equal parts, flour and water in a glass jar stirred up, cover it with a breathable lid and do that every day. This will literally last for a lifetime if you feed it every day and take care of it that’s how you get heirloom sourdough starter. I also have starter that I’d be happy to send you. It’s fun to start your own with a loved one.